英语语法分析

Its first limiting amino acid was methionine plus cystine.

它的第一限制性氨基酸为蛋氨酸+胱氨酸。

The technology of extracting L-cystine from chicken feather was discussed.

对以鸡羽毛为原料提取L -胱氨酸的工艺进行了探讨。

Extraction of cystine from human hair is one of the method to obtain this material.

从人发中提取胱氨酸是获得该物质的方法之一。